A block of mass 2.20 kg is acceleratedacross a rough surface by a rope passing over a pulley as shown in Fig. 7.91 . The tension in the rope is 10.0 N , and the pulley is 10.0 cmabove the block . The coefficientof friction is 0.4 . (a) Determine the acceleration of blockwhen x = 0.4 m . (b) Find the value of x at which the acceleration becomes zero .

A block of mass 2.20 kg is acceleratedacross a rough surface by a rope

1.	A block of mass 2.20 kg is acceleratedacross a rough surface by a rope passing over a pulley as shown in Fig. 7.91 . The tension in the rope is 10.0 N , and the pulley is 10.0 cmabove the block . The coefficientof friction is 0.4 . (a) Determine the acceleration of blockwhen x = 0.4 m . (b) Find the value of x at which the acceleration becomes zero .
Answer» Solution :(a) TAN `THETA = ((1)/(4))` cos `theta = ((4)/(sqrt(17)))` As T cos`theta - MU mg = m xx a` (B) T cos`theta' = mu N`